/Engine/Source/Runtime/Sockets/Public/SocketSubsystem.h
To better support multiple network interfaces and remove ambiguity between address protocols, it is encouraged to use GetLocalAdapterAddresses to determine machine addresses. Be sure to check GetMultihomeAddress ahead of time.
The local host address
virtual [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [FInternetAddr](API\Runtime\Sockets\FInternetAddr) > GetLocalHostAddr ( [FOutputDevice](API\Runtime\Core\Misc\FOutputDevice) & Out, bool & bCanBindAll )